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Mechanisms linking stress and ageing in two avian species exhibiting contrasted natural resistance to stress (NAtural REsistance to Stress-Induced Cellular Ageing)

Descrizione del progetto

Il ruolo dello stress nell’invecchiamento cellulare

L’invecchiamento cellulare è un processo enigmatico con molti dei suoi aspetti che rimangono scarsamente compresi. L’obiettivo chiave del progetto NARESICA, finanziato dall’UE, è quello di studiare il ruolo dello stress nel processo di invecchiamento. Utilizzando la lunghezza dei telomeri come biomarcatore dell’invecchiamento, i ricercatori studieranno come lo stress cronico e in particolare gli ormoni glucocorticoidi dello stress accelerano l’invecchiamento in due specie aviarie. L’accento sarà posto su determinati potenziali fattori di invecchiamento, quali la funzione mitocondriale, lo stress ossidativo, il danno al DNA e la segnalazione cellulare mTOR. Nel complesso, i risultati del progetto sveleranno importanti informazioni su un processo biologico fondamentale con implicazioni cliniche.

Obiettivo

Previous research has identified stress exposure as a key factor influencing health state and ageing rate. The overall aim of the proposed project is to investigate the precise mechanisms linking stress exposure to accelerated cellular ageing (using telomere length as a biomarker of ageing), and to identify potential mechanisms allowing some species to better prevent stress-induced ageing than others. To this aim I will use two avian species (Japanese quail and king penguin) to investigate (1) if chronic stress affects telomere shortening differently between species exhibiting contrasted stress resistance, (2) if glucocorticoid ‘stress’ hormones are directly responsible of the stress-induced alterations in telomere dynamics, (3) by which mechanisms (i.e. alterations of mitochondrial function, oxidative stress and DNA damage, impaired mTOR cellular signalling or telomere maintenance) stress exposure is accelerating telomere shortening, and if king penguin have specific mechanisms preventing/limiting stress-induced telomere shortening, and (4) if chronic stress / glucocorticoid hormones modify the acute oxidative stress responses of individuals. To this end, I will employ experimental approaches manipulating stress exposure and glucocorticoid hormones in captive Japanese quail and wild king penguins, and measure the resulting impact on telomere shortening and its potential cellular drivers (mitochondrial function, oxidative stress, mTOR cellular signalling). This project will enable a two-way transfer of skills and competences between the applicant and the host, by providing training to the applicant regarding mitochondrial biology, cellular signalling and gene expression, and by providing the host with the opportunity to integrate an ageing component through the use of telomeres in his current and future projects.

Coordinatore

UNIVERSITE LYON 1 CLAUDE BERNARD
Contribution nette de l'UE
€ 184 707,84
Indirizzo
BOULEVARD DU 11 NOVEMBRE 1918 NUM43
69622 Villeurbanne Cedex
Francia

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Regione
Auvergne-Rhône-Alpes Rhône-Alpes Rhône
Tipo di attività
Higher or Secondary Education Establishments
Collegamenti
Costo totale
€ 184 707,84